![]() These transparent blue, green, aqua, red, purple, yellow,etc. ![]() Some "creative" sellers claim that "blue obsidian" forms when lava reaches the water! WOW. They claim that it's "natural", a "mineral" (which is false-obsidian OR glass are not minerals), "rare" in colors such as aqua and blue, and even give it names such as "Himalayan Blue" and "Siberian Blue" and "Andara Blue" and "Gaia Stone*" and many, many more. There are a LOT of sellers on the internet, on Etsy, on Ebay, on all sorts of websites, who are selling colored man-made glass as Obsidian. Apache Tears are naturally smooth nuggets of dark obsidian: Mahogany Obsidian is brown or reddish brown due to iron impurities. Snowflake obsidian has white splotches due to cristobalite spherulites. Sheen Obsidian has blue, green, or golden flashes of color that glows and moves with the light, due to inclusions of torpedo-shaped or needle-shaped gas bubbles. Also remember, it is glass, and small shards of it can end up in the skin f you are not careful.Rainbow Obsidian and Fire Obsidian are colorful due to inclusions of Magnetite nanocrystals. ![]() This also means that it can chip relatively easily, so it is advised to use caution when cutting this stone. It has conchoidal fracture, which is a curved fracture pattern, and as such it is commonly seen as a stone used in making arrowheads and spears. Obsidian can be a little difficult to work with. There are different types of sheen – gold, silver and fire (with hematite inclusions) are popular. Sheen: Sheen obsidian has small inclusions of metals that cause an iridescent sheen on the surface. Rainbow obsidian: Rainbow obsidian is an iridescent combination of multiple colors of glass. ![]() This produces small snowflake or starburst patterns, creating snowflake obsidian or fireworks obsidian. This crystallization is not uniform, but rather forms at nucleation points. Snowflake and fireworks obsidian: Because volcanic glass is slightly unstable, sometimes it will start to crystallize over time. This reddish brown is called mahogany obsidian. Mahogany: A common form of obsidian has black and reddish-brown color in it. Midnight lace obsidian is found in Armenia and a small deposit in Oregon. Then, the layers slipped down the side of the volcano while still hot and were swirled together. It may be the result of two different flows with different compositions, which were laid on top of each other. Occasionally, swirled patterns of different colors, such as black and white, may be seen. Midnight Lace Double flow obsidian: Obsidian is the result of molten glass flowing down the side of the volcano. However, when cut thin, as in slabs used for cabochons, it is often translucent. There are several varieties of obsidian:īlack obsidian: Typical obsidian is black. Although obsidian is usually associated with highly explosive volcanoes, which normally produce light colored rocks that are very porous (like pumice), obsidian is typically dark colored – most often black. Glass cools so quickly that it doesn’t have time for crystals to form, although in some instances some minor amounts of crystals may be seen. Obsidian is natural volcanic glass that forms from highly explosive eruptions.
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